BUG: Invalid index type "Tuple[slice, int]" for "_LocIndexerFrame";

[bashtage]

Describe the bug
Standard loc operations fails

To Reproduce

import pandas as pd

df = pd.DataFrane({1000: [1,2,3], 2000:[3,4,5]})
df.loc[:, 2000]

Produces

 error: Invalid index type "Tuple[slice, int]" for "_LocIndexerFrame"; expected type "Union[Union[slice, ndarray[Any, dtype[signedinteger[_64Bit]]], Index, List[int], Series[int]], Union[Series[bool], ndarray[Any, dtype[bool_]], List[bool]],
 List[Union[str, str_]], Tuple[Union[Union[slice, ndarray[Any, dtype[signedinteger[_64Bit]]], Index, List[int], Series[int]], Union[Series[bool], ndarray[Any, dtype[bool_]], List[bool]], slice, List[Union[str, str_]], Tuple[Union[str, int, slice], ...]], Union[List[Union[str, str_]], slice, Series[bool], Callable[..., Any]]]]"

Please complete the following information:

• Windows
• 11
• 3.10
• mypy 0.961
• pandas-stubs 1.4.3.220710

[bashtage]

Loosely speaking I think loc should take some combinations like

_sliceT = Union[slice, pd.IndexSlice]
Label = Hashable | None

Sequence[Label]
_sliceT
Label
tuple[Sequence[Label], Sequence[Label]]
tuple[Sequence[Label], _sliceT]
tuple[Sequence[Label], Label]
tuple[_sliceT , _sliceT]
tuple[_sliceT , Sequence[Label]]
tuple[_sliceT , Label]

[bashtage]

closed in #138